Improving Eyesight With Refractive Error Correction Device
A refractive error correction device is used to treat refractive errors of the eye, which are among the most common types of eye problems faced all over the world today. In order to determine the best type of refractive error correction device for your eyes, it is necessary to first understand what refractive eye errors are and which type of refractive error you are suffering from.
Understanding Refractive Errors
Contrary to popular belief, the human eye does not exactly see the things it looks at. What it can see is the light that is reflected by all objects. This reflected light strikes the corneal surface inside the eye, thus enabling the eye to focus on the object. The light travels further inside your eye through the eye lens. It is fine-tuned and focuses on the retina, which is the nerve layer present at the back of the human eye. Once the image is reflected on the retina, it travels through the optic nerve and reaches the visual area inside the brain, which is when the eye can ¡®see¡¯ the object it is looking at.
The light that travels through the cornea should enter the eye in a bent curve, or in other words in a refracted manner. Only then will the light focus precisely on to the retina and result in an absolutely clear image. If the light is not refracted properly, it will not focus properly and the end result will be a blurry picture of the object. When such refraction does not occur, it is called a refractive error of the eye. Most refractive errors are caused when the shape of the cornea, the eye lens, or the eyeball is not optimal or is imperfect.
A refractive error correction device is what corrects such refractive eye problems and restores proper vision.
Types Of Refractive Errors
Refractive eye errors are classified into 4 main types. Their resultant eye conditions are as under:
- Myopia: This condition is brought on when the shape of the eyeball is deeper than normal. The distance between the front of the eyeball and the back is greater than it should be, thus causing the image of an object to appear in front of the retina as opposed to on it. This condition is also called nearsightedness as the near sight is perfect but distant objects cannot be seen clearly.
- Hyperopia: Also known as farsightedness, this condition is the result of an eyeball that is shorter than what it should be, which means an image appears behind the retina and not on it. Objects at a distance can thus be seen clearly whereas close objects appear blurry.
- Presbyopia: With age, the eye loses its ability to focus clearly on objects at different distances. This condition is called presbyopia.
- Astigmatism: Imperfectly shaped eyeball, cornea, or irregular curvature of the eye lens results in the inability of the eye to focus clearly on objects at any distance. This condition is called astigmatism.
Thus, once you understand which refractive error you are suffering from, the condition can then be treated with the appropriate refractive error correction device.
Correction Of Refractive Vision
Correction refractive vision is possible by using eyeglasses, contact lenses, or by undergoing eye surgery. Let¡¯s take a look at each of these in turn:
- Eye Glasses: Spectacles are used to treat refractive errors by adjusting the focusing power of the cornea and lens. Depending on the type of refractive error present, the focusing power is either subtracted or enhanced so that images are now focused properly on to the retina. This focusing power is measured in diopters, which in turn becomes your spectacle prescription.
- Contact Lenses: Contact lenses typically work by placing artificial lenses in front of your eyes. The light from objects thus enters your eye in a refracted manner, which helps to focus the object being viewed properly on to your retina.
- LASIK: Laser eye surgery is used to correct refractive eye errors by altering the shape of the cornea permanently. With the help of the laser, small bits of corneal tissue are removed, thus changing the corneal shape as required and reducing the refractive error.
In addition to the above, natural vision correction methods can also be used to treat refractive errors. These include:
- Vision Therapy: Use of eye exercises and other types of therapy that help you change the way your eyes see so that they can focus better.
- EyeRelax: Refractive error correction devices such as EyeRelax are scientifically developed to treat eye problems. By using these eye devices, you can not only treat the symptoms of your refractive errors, but can also train your eyes to perform optimally.
Millions of people all over the world are still functionally blind because of uncorrected refractive errors. With the help of a refractive error correction device, it is now possible for them to regain perfect eyesight.